Problem with ADO

Hello,

First of all, excuse me for my very poor english : I just "speak" a bit of
english...

We recently have a problem with some PCs and ADO : we can connect our
programs to databases (SqlServer 2000 or Express 2005) via ADO.Net or ODBC,
but it doesn't work via ADO !? PCs are under Windows 2000 or Windows XP
(SP2). Our programs written in C# or VB.Net which use ADO.Net work perfectly
with the databases. But our programs written in "old" VB6 can't connect to
the same
database on the same computer (*) It's not the case for all the PCs, just
for a small minority... For these minority, the problem concerns third
partie products too... And with XP SP2, whe can't try to reinstall MDAC,
because Windows rejects the reinstall...

Any idea ?

Thanx in advance !!!

(*) We are sure it isn't a problem of connect string, you can forget this
reason ;-)



.

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